Development of a capacitive chemical sensor based on Co(II)-phthalocyanine acrylate-polymer/HfO<inf>2</inf>/SiO<inf>2</inf>/Si for detection of perchlorate

M. Braik, C. Dridi, M. Ben Ali, M. Ali, M. Abbas, M. Zabala, J. Bausells, N. Zine, N. Jaffrezic-Renault, A. Errachid

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Abstract

© Author(s) 2015. We report the development of a chemical sensor based on a Co(II) phthalocyanine acrylate polymer (Co(II)Pc-AP) for perchlorate anion detection. We have used two types of transducers, silicon nitride (Si3N4) and hafnium oxide (HfO2). The adhesion of the Co(II)Pc-AP on different transducers and their surface qualities have been studied by contact angle measurements. We have studied the pH effect on Al/Si/SiO2/HfO2/electrolyte capacitance values for different phosphate buffer solutions (PBS). This optimization step has allowed a sensitivity value of about 44 mV decade-1 towards H+ ions. The fabricated sensors based on Si3N4 and HfO2 transducers functionalized with a Co(II)Pc-AP membrane have been characterized by C(V) measurements for different perchlorate concentrations (from 10-7 to 10-2 M). The sensor developed with the HfO2 transducer shows better performances compared to that based on Si3N4: a larger detection range (10-7 to 10-2 and 10-3 to 10-2 M, respectively) and lower detection limits (10-7 and 10-3 M). The specificities of our perchlorate sensor have been tested for some interfering ions (nitrate, sulfate and carbonate).
Original languageEnglish
Pages (from-to)17-23
JournalJournal of Sensors and Sensor Systems
Volume4
Issue number1
DOIs
Publication statusPublished - 16 Jan 2015

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    Braik, M., Dridi, C., Ben Ali, M., Ali, M., Abbas, M., Zabala, M., Bausells, J., Zine, N., Jaffrezic-Renault, N., & Errachid, A. (2015). Development of a capacitive chemical sensor based on Co(II)-phthalocyanine acrylate-polymer/HfO<inf>2</inf>/SiO<inf>2</inf>/Si for detection of perchlorate. Journal of Sensors and Sensor Systems, 4(1), 17-23. https://doi.org/10.5194/jsss-4-17-2015